Automatic regulator



Jan. 13, 1931. w. D. bRElSKE 8 AUTOMATIC REGULATOR Filed an. 12. 1928 2 SheetS-Shee' k 1 N g In fi N N f I v I 2 I a k 1 i I Q N g i 1 g? Fl 1 g J h v Q3 1 W R Q.

.6 v N I J A 1511x4712?? WillwwuDDrazjsm Jam; 13, 1931. w. D. DREISKE I 1,788,619

- AUTOMATIC REGULATOR Filed Jan. 12. 1928 2 Sheets-Sheet 2 Ell/6 716 W/LlLdf/LD.D7ai/5h Patented 'Jainfll 3, 1931 i fW IliAMfQJDREIs/KE, or}oextfAniiLLiiiois r ATiTOMATIC fAppli'cation'filetiJanuary: 12, 1328;; s'eriai-n 24 ,143.

l .This invention relates to}, ail-tometic controlling apparatus n "general, but more par ticuliarly to iepparatus ot K this kind for sgov I erning or cont-rolling a boi-ler flrrnejce' damp- 1 er, thereby to automatically grovern'or con-j,

trek the rise: and fail .of the steanipressure.

ployed J for supplyingthe; motive powerfor operatingthe; damper: 'orjrothe-r meanstolhe controlled, as Well; a's swfor opemtingthe comv ;pensziting devicethaturnodifies or controls- .thejmotor controlleryvvhich latterr-is com I 'trolledjloy the said; pressure; responsive device connected with theisteem pressure from; the

boiler, or with anyothersource; offl-hid .pres

snre. a V r I I lt'is elso anohject to-provide certain details. endfeatures'of;construction and-cOm-I bintttions tendingtof increase; the I general I e fiiciency the desirabilityozf en automfitica 'controllinw'apparatus of this: particular p character.- i

To the foregoingrandother useful ends the f inventionzconsists in the inetters hereinaften-:- set forth end. .oleimfed fand' shown fill 'thfi ia-cef ,v

' 'directiongthe 'deniper lkha's a C1OSiI1gifl1QVe1r O ment, and] the traveler 7 moves: toward;ithe,-*

- c'om'panyin'g-drawing'guin which Jfig; l-is agsideelevation;more crfless die]- grammatic inchairactenlof'anautomaticcon-.

trolling 12!, of the invention.

' thereof in verticah section, to i facilitate; the

inventiomm invention comprises "(a steam pressure re-,

a. pipe 2 with theboilersapressureyoriwith any i f other suitable sou'roegof fluid pressure which I (it; is desired to; glneinteiniiat soli'le v predeter mined; degree'ot" pressure; ,esrnearlygas;pose-' si'ble'. 1 The countsthe'llericeiv lever-j 53 is ,fful; h ir i s ew t theeontactsbwienglig -ereincljudediirix gir t l u crum'ed at 4; as; showmziand thei fidiephmgm pperatus embodying the principles? 7 Fig.2-is a similarviewrshowingze difiere'nt'; torn; off the"invent onyiwithcerta1n=;,-parts f As thus, illustrated,1 z iin'i particularly to Fig. 1 itiwillfbeis egfl tthetij'the: Q

-' sponsi-ve diephregmi device ;l"-,- ;connec tec1:- by ;v

has a knife edge which-V1supportsi theiselid levrfinth substantiall ,termite]; position-T shown? The counterbalance {weight 6 is supported onia traveler having Wheels 8} that travel on the upperedge of the lever; 3; in the manner shown. A rotary motor- 9, such asen ordinary'e1ectric' n1otor, is prof :vided; in.stationeryposition over-the die- 'phragm:- pressure responsive device, and is- 1 provided; with one; fclrunrlO having a cable i 11 'WQHndI thereon; and with anotherdrumw 01: 12 having" a cable l3iv'o'und thereonfl Therm cab lefll is connected with the-lever "13 pethei damper 14k in theslnoke flue fthehOiIerEfIirEf na'ce, the other' end Ofgthishleverhavingwa 5 counterbalance weight 15 for opening; the; damper; The cable/113' is lco'nnectedlato'the traveler" 7 i at '16, as shown. An operating-w. Weight 517 fonoperating thetraveier 7atothegright ontheiever' 3', is connectedby a 'ceblen 18-wi-th the traveler Z at 19,thiscab1e lEiber-j" ing;trainedoveraj sheave 2O 'carr-iedon the" V distalend ofthelever-fi, as shown; Thusztheh 1 V niot'or,-;When it r'otetesrin thendirection indi- 1 'cated by the arr0w;21-,; causes an opening! r movement ofthe damper 14, and at the: same 1 timeffimoves {the traveler s7 ftolthe1 left end."

raises-the weightlfii'n amannerthatjwillpbef readily-1 understood. 'Oni the ,iother 'haLnd; Whenthemotor isoperated in theioppositea right.;:becausej of the pull 1 Lthereon they tor is u'seclfis'preferehly:of-the:positive start 1 f e and stopzty'pe, being self braking, so that will stop" instantly as soon as the electric vcur-z current to theniotor', comprises a pair ofstraej tiomry cenmts (22; and 23 together vvith I a 1' A inovahl ejcontact 24 cerried 'hy: theifouterf end, I oftheerin or lever 3; orby ahyfisuitahle por fl tion ofithislever for itislthehp andfdolwn'T inotionofjthisflever 3 'v vhich is mostconven f ientl'yz utilizedias the; means forcontrollingxf i v I the.electricgswitch or: ihOLQP?control-leriwhich' r is necessary'ior;thie. starting smellstoppin'gaozf 7 twin-be understood that cuits which also include the motor 9 and a ,suitable source of electric current supply.

Thus the electric circuit. controller serves also to limit the up and down movement of the counterbalance arm., A secondcompensating device, for more or less modifying the action of the traveler 7 or main compensating device, thereby to govern'the electric.

controller, comprises a cam plate 25 rigidly stop roller 26 to force the lever 3 downward, and adapted when its under surface strikes the similar stop roller 27 to force the lever 3 upward, thus in et'tect modifying the action of the traveler 7 and its 'functionof causing'a modifying effect on the tilting movements of the lever 3, which tiltingmovepreviously mentioned.

mentsare caused the diaphragm device 1 "In operation, when the pressure in the device 1 falls below a certain point, the arm 3 starts downward from its normal position,"

as shown, and when the contact 24 engages the contact '23 a circuit is, closed through the source ofcurrent (not shown) and the motor 9, causing the latter to rotate inthe direction indicated by the arrow 21, thus movement. This operation of the motor also causes the traveler?- to move to the left until the lower surface otthe cam plate 25 engages the stop roller 27, and when this happens the consequent slight upward move- 7 ment of thecam plate will necessarily cause the arm 3 to start rising, and will thereby separate the contacts 24 and23, thusposi tively stopping the rotation of the "motor and the opemng'movement of the damper be-r fore waiting for the counterbalance-6 to effect this action by-reason oi themerei'act of its movement closer to the fulcrum 4, which in itself would be sufiicientto finally cause the upward movement ofthe lever 3, but thecam actionbetween the plate 25 and the-roller 27 accelerates or 'slightly advances this action and the consequent stopping of the motor in themanner explained. There- 'after, when the pressureinthe. device 1 rises to a predetermined point, the lever 3 will be raised, causing the contact 24 .to engage thecontact 22, thus closing-a circuit through; the source. of current and the motor 9, c'aus-I ing the motor to rotate in anopposite direction, thereby causing the damper 14' tohave.

-. a closingmovement, and, at the same'time, theoperation ofthe motor causes the weight lee " lZ 'to pull the, traveler 7 to the right,and this would continue until the weight'16 pulls the ilever. 3 down to normal position, but the enga'gement of the upper surface of thecam plate 25 withthe roller 26 hastens or accelerates' this action more or less,. causing the lever 3 tobe positivelyfmoveddownward to;

mounted, as shown, or in any suitable or de-. sired manner, on the traveler '7, adapted 7 when its upper surface strikes the stat onary causing the damper 14 to have an openingbreak the circuit and thereby positively stop the motor in time to prevent the action of the weight'6 from pulling the arm 3 down far enough to cause the contact 24 to engage thecontact' 23, which latter action would immediately start a reverse movement of the lever 3, which would be undesirable. Therefore the shiftingof the weight 6 in one direcs tion,-when thepressure in the device 1 falls, shortens the periodofrest of the contact 24 against the contact 23, and the shifting of the weight 6 in the oppositedirection, when the pressure in the device rises, shortens the period of restof the; contact 24 against the contact 22,'and this period of rest in each case is still further shortened by theaction of the cam plate '25 and'the steps 26 and 27' previously described, except that in this case a third compensating device is provided, comprising a frame 28 suspended from the drum 29 of the motor30 by a cable'31, this frame having a'cylinder32 rigid with its lower portion. -The upper and lower ends of the cylinder are connected by-a by-p'a ss 33 having a regulating valve 34therein. The

plunger'orpiston head 35 in the cylinder has a rod 36, to the upper end of which the cable 37 is attached, this cablebeing supportedby a sheave 38 on the'motor base, and having its other end'con'nected at .39 to thetr-aveler v shown, this traveler being similar to the one previously described: A weight 40'is slid able up and down on the rod .36 and s supported by acable 41, which is in turn supported on a stationary sheave 42, the otner end of this cablebeing connected at 43 wlth the upper end of the rod36 previously mentioned. A'suitable liquid is carried in the cylinder 32, above and below the piston head or plunger. Thus, when the motor 30 is rotating-to open the damper 44,'the frame 28 is being'lowered, such lowering being re- :t-arde'd by the dashpot arrangement, and the 3 consequent downward i movement of the dashpot plunger or piston head on its rod 36 will cause the cable 37 to pull the traveler to theleit, against the pull of the weight 45,- thus shifting the A counterbalance weight Ive 46 from one position to another on the COUJ1 terbal'ance arm 47, in the-manner previously eXplainedL'Then, when the-motor is -re'-'- versedtocause the closing movement oftlie 4 damper, the "dashpot contrivance is. pulled upward -byi-the motor, thus allowing the Weight 45' topull the traveler to the right.

[Thusthe 'dashpot' and "its weight form a part of the operating connection betWQQli hemetor and the traveler. '1' 1 I i 01 this kind being, very. commonandl wellunderstood; i

7, Thus in either form: of the invention there l v are instrumentalities characterized by horie- 1 zontalmovement compensation acting vertincally for automatically operating a motor 1 Y rfisama Figs. 1 and 2, it :will be understood, are

- partly diagrammatic, showing how'the three contacts of the electric controller can be connected to binding posts on the motor, it be ing understood that the internal circuits of the motor canbe of any suitable or wellf known character, reversible rotary motors controller, as in each case the jweight tfi or 46) is movable horizontally to provide a variable compensation, suchiweight acting v er Y sufficient to open and close the contacts, therebyto start and stop the motor. As the motor is a rotary motor, it hasno self-im posed or self-contained stopping means, as does, a reciprocating motor, and is characterized by continuous rotary motion until stopped bythe cessation of the electric cur-- rent supply. Moreover, with .thedashpot arrangement shown in 2 of the drawings, means are provided for mo i th weight 46 on the arm 47, whilethis arm is in normal position, and while the motor is not running. For example, the pressure may havefallen to a low point, and the electric controller starts the motor 30, and the latter opens thedraft damper, or operates thef other means to be controlled, and at the 'StII16 time moves the weight 46 on the arm KO]? switch'will be automatically opened by: the shift of the weight, in' the-manner fully 4-7, away from the weight 45, whereby before a rise inthe pressure theelectrica controller explained. HoWever, at such time the dean, m.

sire'd high pressure' may not have. been reacli'ed,and under such clrcumstances the a 1 dashpotvarrangement shown inFig, 2 constitutes a meansfor movingthe weight 46 on fthe arm47, towardthe weight 45, after the" arm has returned to normal position, 'there{' by] to again f ioperate the gswitch; or: electric controllerkand start the motor'agaimif the pressure has not been raised 'j sufficiently, thus keeping the draftQdamper openf untilthe steam pressure has been built u'pto thef desired degree. Thus, the desired high pres [sure mark is reached sooner and more defi nitely than in cases'where'the compensating'- 1 weight on the counterbalancearm can-only move when the motoris running, and when sai cl iarm to move pw'a'rd:

.connecti'orrbetwee v t 42' In automatic controitlin ap aratus, in"; combination; with --means to be contro-ll ed,-ia

,rotaryiniotor=. foit; operating: said means, a

.pontaace; and of aavanta e, as it rel-levesf f', ica'li function, such: askthe; operation of valves gOff r i hanical parts and; confines they "ptarmoown movement*o-:t';

'o-thaopeningrancluclostngi,

the connterbalancefi arm I 0 any} meo'h is J assau ts; a counter anac arm,

rbal ce, wei amn; said travel traveler nweigh j 3 I ti olling'apparatuatm of 5a motora'f'or operating: the pensive :for-causing -sai'd;

" ownga traveler on said;

g novelty gdisclbse'd, what in, elements cooperatinggwith sjaid I i compensate ngstg mod yl theactiion ofiioo 1 compensatingdevice stops adjak cent'the oppositeelimits of motion'oii s'aid; i trax'zelergaad acam plate on; saidgtraveler. d sto move linden one. stop: to.-

posed at' an ang the counterbalance arm: downward; and} adapted to move over the other stopto-eause com-p1 1 n daship 7 oer suspended irom the motori-amd:traveler forming;anaoperatin controller for; starting "and stopping said a motor, andfor reversing the rotation of said motor, and lnstrumentalities for automatical ly operating said controller, thereby to; auto-- a l matically controlsaid means, said instruand a weight on said arm, and a pressure-responsive devic'e iior causing saidarmtomove up and down, said welghtbelng movable horl- 'zontally from'one position to another on said arm," and said motor havingmeans for auto-ff; i

vmentalitie'scomprising acounterbalance arm matic ally shifting said weight from one posi I iingdevicel 4 c, '5 In automat1ccontrolllng-apparatus, in, i combination-withmeans to be controlled, a

rotary motor-for'operating said means, a con-,

' tion tojanother, forming a main compensat in'g device'tomodify the action ofsaid'instrm Qmentalities, togetherjwitha-"se'cond, co'mpen satingdevice"operative to. move said weight' i while said armisin normal position and While '7 said motor notin operation and serving to jmodify the iaction of said main compensat-.

' troller. for starting and stopping said motor,

an'dfor reversing the rotation of sa id-motor,', 7 I and :instrumentalities' for automatically operating said controller, thereby to automati-- cally control said means, saidinstrumentalities comprising a counterbalance arm and a. 7 Weight on said arm, and a pressure'responsive' device for causing'said arm to move up and doWn,,said Weight being movable horizontal-w ly from one positionto anotheron said arm, and said motor having means for automatically shifting said weight from one position to another, forming am'ain compensating do vice to modify the action of saidinstrumen-- l5 talities, together Witha second compensating" device serving to modify the action of said main comp'ensat ingdevice,and a third compensating device servingto'mo'dify the 5action of said other compensating devices 7 20 '6.-In automaticcontrolling apparatus, in combination with means; to be controlled, 'a

rotary motor for operating said'means,.a,.

pressure operated controller for stopping'and L starting said motor, a compensating device operated by said motor, and instrumentalr ties operative to actuate said compensating device while said motor is not in operation, after said-motor has stopped, thereby toagain start. said motion 7 I Y, '7. A structure as, specified in claim '6,said fcompensatingdevice comprising a counter-- 7 balance arm with a Weightmovableg along said arm. I 7 8. A structure as specified in-olaim. 6, said compensating device comprising a :counterbalances-arm With a weight movable-along; saidarm, and saidinstrumentalitie's having a connection by which to move said weight While said arm-is in normal-position. Specification signed this 7th day of Jan'u- 7' ary5 928. V 7

i a [WILLIAM D.EDREISKE.

"as r 

